๐ How Rare Are You in Mexico?
๐ฒ๐ฝ Genetic Landscape of Mexico
Mexico's population reflects thousands of years of Indigenous civilizations โ Aztec, Maya, Zapotec โ blended with Spanish colonial ancestry and smaller African and Asian influences. This mestizo heritage creates a distinctive phenotypic range. Most Mexicans have dark brown eyes and black hair, making lighter features genuinely rare. The country's genetic diversity varies significantly by region: northern Mexico shows more European influence, while southern states like Oaxaca and Chiapas retain stronger Indigenous genetic signatures.
Much of that regional variation has a linguistic shadow. The federal government recognises dozens of Indigenous languages โ Nahuatl, Maya, Mixtec, Zapotec, Otomรญ and many more โ and in parts of Oaxaca one valley can speak a variety the next valley struggles to follow. Naming works differently too: Mexicans carry two surnames, the father's followed by the mother's, so a full name keeps two family lines visible at once and an unusual pairing stands out immediately. Smaller communities add their own threads to the picture โ Mennonite colonies farming in Chihuahua and Durango since the 1920s, Lebanese families who settled in Puebla and Yucatรกn, Chinese-Mexican households in Mexicali, and the Afro-Mexican towns of the Costa Chica, counted separately in the national census only in recent years.
🔀 Eighteen Characters Made Out of Your Own Name
The CURP exists to register, one by one, everybody resident in Mexico — nationals and foreigners alike — along with Mexicans living in other countries. The Interior Ministry describes it as 18 elements of an alphanumeric code: 16 taken from your identity document, the last two assigned by the Registro Nacional de Población. The recipe: first letter and first internal vowel of your first surname, first letter of your second surname or an X if you have none, first letter of your given name, your birth date, H or M, a two-letter code for the state you were born in, then the first internal consonants.
One character exists only to stop two people ending up with the same key. The formula assumes a name plus a birth date almost identifies a person; that character is the admission that almost is not enough. What no statistical operation seems to do is count surnames: search INEGI's metadata catalogue for apellido and it answers "Encontró 0 operaciones estadísticas de 825". Search lengua indígena and you get 28.
๐๏ธ Eye Color
| Brown | 80% |
| Hazel | 10% |
| Green | 5% |
| Blue | 3% |
| Amber | 2% |
๐ Hair Color
| Black | 65% |
| Dark Brown | 25% |
| Brown | 7% |
| Other | 3% |
๐ฉธ Blood Type
| O+ | 39% |
| A+ | 27% |
| B+ | 10% |
| AB+ | 4% |
| O- | 8% |
| A- | 6% |
| B- | 4% |
| AB- | 2% |
Trait frequencies on this page come from public and institutional datasets โ see Data Sources.
🧮 Calculate Your Rarity in Mexico
Pick your eye colour, hair colour and blood type. The calculator uses Mexico's own figures from the tables above, not world averages.
This is an estimate, not a measurement. It multiplies three national frequencies as if they were independent, and they are not: eye and hair colour share pigmentation genes, so a combination that tends to run together, such as blue eyes with blonde hair, is more common than the multiplication suggests, while one that rarely does, such as blue eyes with black hair, is rarer. Blood type is independent of both. The frequencies are national averages from public datasets — see Data Sources.
That number describes the body you were born with. Fraeon, our other site, does the same arithmetic for the part you chose: the films, series, games, books, anime and manga you have actually finished. Start your log →
📋 What the 2020 Census Decided a Person Consists Of
INEGI's Censo de Población y Vivienda 2020 was taken as of 00:00 on 15 March 2020. What it records about a person: sex, age, place of birth, religion, type and degree of disability, school attendance, educational level, literacy, marital status and economic activity. On language it splits hairs on purpose — whether you speak an indigenous language and whether you speak Spanish are two separate items, and the long questionnaire adds a third for understanding an indigenous language.
Eye colour, hair colour and blood type are not on that form. The census does carry two thresholds that show how poorly a national average travels: municipalities where 40% or more of people aged three and over speak an indigenous language and do not speak Spanish, and municipalities where 40% or more consider themselves Afro-descendant, were pulled into the sample with certainty. Numbers exist because an institution had a reason to collect them, which is why the tables above are not all the same kind of number — see Data Sources.
🗳️ The Month a Question Got Added
Counting is a decision somebody makes, and one of those decisions has a date. In October 2014, during the Prueba Integral for the Encuesta Intercensal 2015, INEGI ran a separate test in areas of Chiapas, Coahuila, Guerrero and Oaxaca with a historical Afro-descendant presence. What it was testing was two items based on Afro-descendant self-identification, and INEGI records that those items had been proposed by institutions, researchers and civil-society representatives with an interest in the subject.
The survey that followed had a reference date of 15 March 2015. Five years after that, in the Censo de Población y Vivienda 2020, "autoadscripción afromexicana o afrodescendiente" was no longer a trial item but a standard characteristic recorded for every person counted. That is the whole route, from a field test in four states to a line on everybody's census form, and the record says it started with someone proposing that the question exist.
โญ Rare Facts About Mexico
Which of these numbers has an institution behind it
Mexico's population is counted by INEGI in the Censo de Población y Vivienda 2020, reference date 15 March 2020. Measured adult height comes from ENSANUT, run by the Secretaría de Salud, the Instituto Nacional de Salud Pública and INEGI. The Centro Nacional de la Transfusión Sanguínea publishes regulatory circulars, not a national ABO/Rh series, so the blood table is not an official statistic. The 2020 census records no eye or hair colour, so those two tables are estimates rather than counts. Last checked September 2026.